There are two processes for admission to the traditional undergraduate program of the University of Tokyo. One is for students who graduated from high schools in Japan (General Screening Test) and the other is for students who graduated from high schools abroad (Special Screening Tests). (Both links are in Japanese only.)
As the majority of the courses in the traditional undergraduate programs are taught in Japanese, a high level of proficiency in Japanese is required and the information for both admissions processes accessible from the below links is available only in Japanese.
For those who would like information on the undergraduate programs taught in English, please see the link for the PEAK and GSC Programs below.